It was Tree Planting Day yesterday. We {#blank#}1{#/blank#}(go）to the hill to plant trees {#blank#}2{#/blank#}our teacher. There we learned how {#blank#}3{#/blank#}(plant) trees. We also learned a lot{#blank#}4{#/blank#}plants. For example, trees can{#blank#}5{#/blank#}(help)clean the air. They give us food like apples,{#blank#}6{#/blank#}(peach), oranges{#blank#}7{#/blank#}pears. People and other animals need {#blank#}8{#/blank#}(they)to live. We planted many trees yesterday. We were very{#blank#}9{#/blank#}(tiring), but we felt very {#blank#}10{#/blank#}(happily).